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Framework Comparison & Selection
LangGraph / CrewAI / AutoGen / Pydantic AI / Mastra — which for which use case?
2 hours3 prereqs
Decision matrix:
| Framework | Lang | Best for | Trade-off |
|---|---|---|---|
| LangGraph | Py + TS | Production multi-agent, durable | Complex API |
| CrewAI | Py | Fast prototype, role-based | Limited durability |
| AutoGen | Py | Conversational multi-agent, code exec | v0.4 maturing |
| Pydantic AI | Py | Type-safe, FastAPI vibe | New, small ecosystem |
| Mastra | TS | Next.js production | TS-only |
| Vercel AI SDK | TS | Streaming UI, frontend | Weak workflow primitive |
| LlamaIndex WF | Py | Event-driven, RAG-heavy | Different mental model |
Practical recommendation: TS = Vercel AI SDK + Mastra. Python production = LangGraph. Fast prototype = CrewAI. Type-safety obsessed = PydanticAI.